I have a different theory. I'd rather have my bacteria seeding and multiplying by processing the current fishfood I'm using and current fish vs. a table shrimp and bottled ammonia. Maybe at the end of the day its the same microfauna regardless of what you use, but it does work. I can observe fish behavior, breathing, eating habits, hiding, etc, to know if there is something up. Like I said,its not for everyone, and I'm sure there are situations where it is being abused and harmful to fish, but with the right amount of testing and observation, I don't see the harm in it.